A small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules for your business objects.Release notes: New Release<br/>TE Dropped compatibility for .NET 3.5 and MVC2.

A small validation library for .NET that uses a fluent interface and lambda expressions for building validation rules for your business objects.Release notes: New ReleaseTE Dropped compatibility for .NET 3.5 and MVC2.TE Removed the SupportsStandaloneValidation property - this was never properly implemented.TE Implemented Rule SetsTE Add support for CustomizeValidatorAttribute when using MVC integration.TE Remove generic PropertyRule - use non-generic version instead.TE Better support for custom client-side error messages for LengthValidator.TE Add support for MVC3's IClientValidatableTE Implement client-side support for InclusiveBetween validator.TE Implement client-side support for Equal with cross-property validation.TE Implement client-side support for email validator.TE Added credit card validator (plus client side support)TE Add IValidatorInterceptor interface. This can be used to add pre/post hooks to MVC validation integration. An interceptor can either be specified as part of the CustomizeValidatorAttribute or implemented in the validator.TE Better handling of nullable value types. [ Fluent Validation for .NET full changelog ]